正则表达式从名称中提取首字母

Question

eg. if the Name is: John Deer
the Initials should be: JD

我可以使用子字符串在Initials字段上执行此检查,但是想知道我是否可以为它编写正则表达式？编写正则表达式比使用字符串方法更好吗？

Answer 1

这是我的解决方案.我的目标不是提供最简单的解决方案,而是提供一种可以采用各种(有时是奇怪的)名称格式的解决方案,并在首字母和姓氏初始(或在匿名用户的情况下)产生最佳猜测.

我也尝试用相对国际友好的方式编写它,使用unicode正则表达式,虽然我没有为多种外来名称(例如中文)生成首字母的经验,尽管它至少应该生成一些可用的东西用两个字来代表这个人.例如,用"행운의복숭아"这样的韩语命名,就会产生행복,正如你所预期的那样(尽管在韩国文化中这可能不是正确的方法).

/// <summary>
/// Given a person's first and last name, we'll make our best guess to extract up to two initials, hopefully
/// representing their first and last name, skipping any middle initials, Jr/Sr/III suffixes, etc. The letters 
/// will be returned together in ALL CAPS, e.g. "TW". 
/// 
/// The way it parses names for many common styles:
/// 
/// Mason Zhwiti                -> MZ
/// mason lowercase zhwiti      -> MZ
/// Mason G Zhwiti              -> MZ
/// Mason G. Zhwiti             -> MZ
/// John Queue Public           -> JP
/// John Q. Public, Jr.         -> JP
/// John Q Public Jr.           -> JP
/// Thurston Howell III         -> TH
/// Thurston Howell, III        -> TH
/// Malcolm X                   -> MX
/// A Ron                       -> AR
/// A A Ron                     -> AR
/// Madonna                     -> M
/// Chris O'Donnell             -> CO
/// Malcolm McDowell            -> MM
/// Robert "Rocky" Balboa, Sr.  -> RB
/// 1Bobby 2Tables              -> BT
/// Éric Ígor                   -> ÉÍ
/// ??? ???                 -> ??
/// 
/// </summary>
/// <param name="name">The full name of a person.</param>
/// <returns>One to two uppercase initials, without punctuation.</returns>
public static string ExtractInitialsFromName(string name)
{
    // first remove all: punctuation, separator chars, control chars, and numbers (unicode style regexes)
    string initials = Regex.Replace(name, @"[\p{P}\p{S}\p{C}\p{N}]+", "");

    // Replacing all possible whitespace/separator characters (unicode style), with a single, regular ascii space.
    initials = Regex.Replace(initials, @"\p{Z}+", " ");

    // Remove all Sr, Jr, I, II, III, IV, V, VI, VII, VIII, IX at the end of names
    initials = Regex.Replace(initials.Trim(), @"\s+(?:[JS]R|I{1,3}|I[VX]|VI{0,3})$", "", RegexOptions.IgnoreCase);

    // Extract up to 2 initials from the remaining cleaned name.
    initials = Regex.Replace(initials, @"^(\p{L})[^\s]*(?:\s+(?:\p{L}+\s+(?=\p{L}))?(?:(\p{L})\p{L}*)?)?$", "$1$2").Trim();

    if (initials.Length > 2)
    {
        // Worst case scenario, everything failed, just grab the first two letters of what we have left.
        initials = initials.Substring(0, 2);
    }

    return initials.ToUpperInvariant();
}

Answer 2

就个人而言,我更喜欢这个正则表达式

Regex initials = new Regex(@"(\b[a-zA-Z])[a-zA-Z]* ?");
string init = initials.Replace(nameString, "$1");
//Init = "JD"

这会处理首字母和空白删除(即那里的'？').

你唯一需要担心的是像Jr.或Sr.或者Mrs ....等等的标题和标点.有些人确实包括那些全名

Answer 3

这是我的方法：

public static string GetInitials(string names) {
    // Extract the first character out of each block of non-whitespace
    // exept name suffixes, e.g. Jr., III. The number of initials is not limited.
    return Regex.Replace(names, @"(?i)(?:^|\s|-)+([^\s-])[^\s-]*(?:(?:\s+)(?:the\s+)?(?:jr|sr|II|2nd|III|3rd|IV|4th)\.?$)?", "$1").ToUpper();
}

处理过的案例：

// Mason Zhwiti                               -> MZ
// mason zhwiti                               -> MZ
// Mason G Zhwiti                             -> MGZ
// Mason G. Zhwiti                            -> MGZ
// John Queue Public                          -> JQP
// John-Queue Public                          -> JQP
// John Q. Public, Jr.                        -> JQP
// John Q Public Jr.                          -> JQP
// John Q Public Jr                           -> JQP
// John Q Public Jraroslav                    -> JQPJ
// Thurston Howell III                        -> TH
// Thurston Howell, III                       -> TH
// Thurston Howell the III                    -> TH
// Malcolm X                                  -> MX
// A Ron                                      -> AR
// A A Ron                                    -> AAR
// Madonna                                    -> M
// Chris O'Donnell                            -> CO
// Chris O' Donnell                           -> COD
// Malcolm McDowell                           -> MM
// Éric Ígor                                  -> ÉÍ
// ??? ???                               -> ??

未处理案例：

// James Henry George Michael III the second  -> JHGMIts
// Robert "Rocky" Balboa, Sr.                 -> R"B
// 1Bobby 2Tables                             -> 12 (is it a real name?)